Question about Smith A.O. SMITH Cyclone XHE Natural Gas Commercial Water Heater BTH-120

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Fails intermittently. low igniter current . heater is 1 yr old, igniter was replaced 2 months ago.cyclone Xi BTH 500A

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  • Smith Master
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Possible loose wire to ignitor or bad control board

Posted on Dec 31, 2017

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Posted on Jan 02, 2017

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SOURCE: i have a Cyclone XHE model BTH 120-250(A) series

Code 11-Pressure switch fails to open or close after five minutes.

This unit will produce condensation--quite heavily at times. The outlet drain hose must be allowed
to drain. Exhaust Vent piping must also drain condensate. Code 11 error would imply that these
must be checked.

90% of the time this problem is related to installation issues with either the vent or drain.

Posted on Jan 06, 2011

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Heater during ignition is making load banging sound out vent pipe threw roof from exaust what could be wrong


sounds as though it might possibly not be igniting first time , it is ignitiong the gas that is present but not staying lit, You should probably have it looked at / serviced. If you are in the UK it is usual to have a regular service to catch such things. A recommendation from friends for a good boiler technician might be worth taking advantage of .

Jul 04, 2015 | A.O. Smith BTH-400A BTH-400A 130 Gallon...

1 Answer

Model # bth199100 low igniter current


Usually requires igniter replacement.
Here is a link to the troubleshooting page - says call service but details possible remedys...
Smith Vertex 100 Power Vent DV Series 120 Instruction Manual Fault And...

Jan 08, 2015 | AO Smith A.o. Smith Bth-199 Commercial...

1 Answer

AO Smith BTH 500 ignitor keeps burning out,is my electronic control the problem?


I would report problem to AO Smith.
Also ask question on pro water heater forum
http://www.thetankatwaterheaterrescue.com/forums/forum3/

AO Smith service handbooks:
http://www.hotwater.com/resources/product-literature/service-handbooks/
If the igniter is not turning off, then that would explain early failure, and it would be caused by the control chipset

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Mar 21, 2013 | A.O. Smith BTH-500A BTH-500A 130 Gallon...

1 Answer

On A.O. Smith water heater model BTH 199 100 where is the heat sensor rod located ?


Parts list:
http://www.hotwater.com/lit/partslists/197728-004.pdf
Flame rod, flame sensor sits next to igniter inside combustion chamber. This can be cleaned with sandpaper. Do not touch with fingers. Purpose of flame rod is to detect whether ignition has caused actual, sustainable fire inside the combustion chamber.
If sensor is bad, or no ignition is detected after 2-3 attempts, then 'no ignition' error is given.
Bad gas control valve, bad-or-dirty flame rod-sensor, low gas pressure, misaligned rod, dirty combustion parts, etc

Service handbook:
http://www.hotwater.com/lit/training/316586.pdf
High gas pressure spikes can daMAGE gas control valve p7

Product manual:
http://www.hotwater.com/lit/im/com_gas/197727.pdf
Word-search for 'failure'
Low gas pressure. p14 and p54
1-3 trials before declaring 'ignition failure. p48
bad flame sensor (clean with sandpaper) #10 p58
unit must be grounded (check outlet with circuit analyzer) #12 p58
Sequence flow chart p59
Rough starts = ignition failure p60
Troubleshoot chart - ignition failure p62

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Mar 12, 2013 | A.O. Smith BTH-199 BTH-199 100 Gallon...

1 Answer

Igniter is not working


1) Copy following link for igniter troubleshoot resources:
http://waterheatertimer.org/How-to-troubleshoot-gas-water-heater.html#igniter

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Nov 20, 2012 | A.O. Smith BTH-500A Commercial Tank Type...

1 Answer

Igniter is not working


Try removing the igniter. (First turn the heater off) There is a heat sensor rod on the igniter. If it is blackened use fine sand paper or a scotch brite pad and clean it so it is shiney. reinstall the igniter (turn the heater back on) and try it. If that doesn't work the igniter may be defective and will require replacement. I have a smaller A.O. Smith water heater and that little trick has saved me three service calls. Good luck.

Nov 20, 2012 | A.O. Smith BTH-199 BTH-199 100 Gallon...

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